Nono, I'm taking General Psychology at college, and our professor went over it with us. She said that it's simply part of being an organism. Just like sometimes you'll randomly get small pains somewhere on your body.
As far as the pain part goes, there's natural endorphines your body produces that help keep certain pains like that down. See, we're actually being constantly being drugged by our body so we don't feel a lot of pain that goes on throughout our body.
This is the reason why heroin addicts are so nasty when they're forced to quit. Heroin acts like another pain-killer. When they do it for a sustained period of time, their body stops producing those pain-suppressing endorphines, so they can feel every single sharp little pain that none of us do.
It's part of being a human being dude.
